Earphone Type: Stereo Bluetooth earphone Bluetooth Standard: V3.0Operating frequency band: 2.4 GHz-2.48 GHz unlicensed ISM BandOutput power: Class 2 power output、 up to 10 metersSupport Profile: HSP、 HFP、 A2DP ProfilesSupport Multiple paired Device: Up to 2 Bluetooth Phones can be pairedBattery Used: 61 mAh (Rechargeable Lithium Polymer)、 3、7 V DC ?Talk Time: 3.5-4 hours Music Play Time: about 3.5-4 hours Standby Time: up to 92 hours Charging time: about 2 hoursPackage inlcudes:1 X Bluetooth Earphone1 X Charging Cable1 X User Manual